AngularJS：textarea和ng-repeat-ed输入之间的双向绑定

我打算问这个问题,但我想出了一个解决方案.所以在这一点上,我正在寻找对我的解决方案的批评.

>我有一个静态textarea,以及一个带有ng-repeat指令的输入.
>当用户在textarea中键入一个句子时,将为句子中的每个单词创建一个输入.
>然后,如果用户更新任何输入中的文本,则更新textarea语句中的相应单词(实际上重新创建整个句子).

演示：http://plnkr.co/edit/bSjtOK?p=preview

问题

请记住,我只有两周时间进入AngularJS学习：

>我是以“棱角分明”的方式写的吗？
>有什么我可以做得更好吗？
>我是否违反任何禁忌？

缩写代码

HTML

<textarea ng-model="sentence" ng-change="parseSentence()" style="width: 100%; height: 15em;"></textarea>

<input type="text" ng-repeat="w in words" ng-model="w.word" ng-change="buildSentance(w)" />

JavaScript的

function WordCtrl($scope,debounce) {

    $scope.words = [];
    $scope.sentence = 'Hello there how are you today?';

    // this is called when the textarea is changed
    // it splits up the textarea's text and updates $scope.words 
    $scope.parseSentence = function() {

        var words = $scope.sentence.split(/\s+/g);
        var wordObjects = [];

        for (var i=0;i<words.length;i++) {          
          wordObjects.push({word: words[i]});
        }

        if ((words.length == 1) && (words[0] === '')) {
          $scope.words = [];
        } else {
          $scope.words = wordObjects;
        }

    };

    $scope.parseSentenceDebounced = debounce($scope.parseSentence,1000,false);

    $scope.buildSentance = function(w) {

        var words = [];

        for (var i=0;i<$scope.words.length;i++) {
          var word = $scope.words[i].word;
          if (word.replace(/\s+/g,'') !== '') {
            words.push(word);
          }
        }

        $scope.sentence = words.join(' ');

        // if the user puts a space in the input
        // call parseSentence() to update $scope.words
        if (w.word.indexOf(' ') > -1) {
          $scope.parseSentenceDebounced();
        }

    }

    $scope.parseSentence();

}

你有趣的问题.我把你的代码放在我的页面上,我注意到的第一件事就是你无法在控制器方法中通过debounce.

下一个问题我注意到你有一个ng-change,用ng-change改变另一个盒子上的值.我将事件更改为Keypress以停止摘要中的摘要.

这是在JSFiddle enter link description here中工作

代码：

HTML

<body ng-app="portal">
    <div ng-controller="WordCtrl">
    <textarea ng-model="sentence" ng-keypress="parseSentence()" style="width: 100%; height: 15em;"></textarea>
    <input type="text" ng-repeat="w in words" ng-model="w.word" ng-keypress="buildSentance(w)" />
    </div>
    </body>

使用Javascript

angular.module("portal",[]).controller("WordCtrl",function($scope) { 
    $scope.words = [];
    $scope.sentence = 'Hello there how are you today?';
    $scope.parseSentence = function () {
        var words = $scope.sentence.split(/\s+/g);
        var wordObjects = [];
        for (var i = 0; i < words.length; i++) {
            wordObjects.push({ word: words[i] });
        }
        if ((words.length == 1) && (words[0] === ''))
        {
            $scope.words = [];
        }
        else
        {
            $scope.words = angular.copy(wordObjects);
        }
    }

    $scope.buildSentance = function (w) {

        var words = [];

        for (var i = 0; i < $scope.words.length; i++) {
            var word = $scope.words[i].word;
            if (word.replace(/\s+/g,'') !== '') {
                words.push(word);
            }
        }

        $scope.sentence = words.join(' ');

        // if the user puts a space in the input
        // call parseSentence() to update $scope.words
        if (w.word.indexOf(' ') > -1) {
            $scope.parseSentenceDebounced();
        }
    }
    $scope.parseSentence();

    });

希望这能解决您的问题.

原文链接：https://www.f2er.com/angularjs/141716.html

AngularJS：textarea和ng-repeat-ed输入之间的双向绑定

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